Glossary

PM0212

4/22

Doc ID 022351 Rev 2

1

Glossary

This section gives a brief definition of acronyms and terms used in this document:

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Block

A block is a set of bytes that can be programmed or erased in one single programming

operation. Operations that are available on a block are fast programming, erase only,

and standard programming (which includes an erase operation). Refer to Section 2:

Memory organization for details on block size according to the device.

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Driver

A driver is a control program defined by the application developer. It is used to manage

the allocation of system resources to start application programs. In this document two

drivers are described, ICP and IAP drivers.

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In-application programming (IAP)

IAP is the ability to re-program the Flash program memory and data EEPROM (DATA)

of a microcontroller while the device is already plugged-in to the application and the

application is running.

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In-circuit programming (ICP)

ICP is the ability to program the Flash program memory and data EEPROM of a

microcontroller using the SWIM protocol while the device is plugged-in to the

application.

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In-circuit debugging (ICD)

ICD is the ability to debug the user software using the SWIM protocol. The user has the

ability to connect the device to a debugger and insert breakpoints in his firmware.

Debugging may be intrusive (application patched to allow debugging) or non intrusive

(using a debug module).

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Memory access security system (MASS) keys

The Memory access security system (MASS) consists of a memory write protection

lock designed to prevent unwanted memory modifications due to EMS or program

counter loss. To unlock the memory protection, one or more keys must be written in a

dedicated register and in a specific order. When the operation (write or erase) is

completed, the MASS must be activated again to provide good memory security.

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Page

A page is a set of blocks. The number of blocks in a page may differ from one device to

another. Refer to Section 2: Memory organization for details on page size according to

the device.

Dedicated option bytes can be used to configure by increments of one page the size of

the user boot code, the proprietary code, and the data EEPROM.

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Proprietary code area (PCODE)

The proprietary code area (PCODE) can be used to protect proprietary software

libraries used to drive peripherals. Refer to Section 3.2: Proprietary code area

protection for details.